Remote-processing BASIC 52 Bedienungsanleitung PDF herunterladen (Seite 16)

RPBASIC-52 PROGRAMMING GUIDE

1-13

OPERATORS

Operator categories include:

Arithmetic =, +, *, /, **, SQR

Relational =, <>, <, >, <=, >=

Logical .AND., .OR., .XOR., .NOT.

Value ABS, INT, PI, RND, SGN

Operator Precedence

The precedence of operators determines the order in

which mathematical operations are e xecuted. Basic

scans an expression from left to right and performs

no operations until it encounters an operator of

lower or equal precedence. For instance,

multiplication takes prec edence over addition.

Parenthetical expressions have the highest

precedence.

The following list is Basic's order of precedence:

1. Operators in parenthesis

2. Exponential operators (**)

3. Negation (-)

4. Multiplication (*) and division (/)

5. Addition (+) and Subtraction (-)

6. Relational expressions (=, <>, <=, <, >=, >)

7. .AND. (logical AND)

8. .OR. (logical OR)

9. .XOR. (logical XOR)

Parenthetical expressions have the highest

precedence, so their use is a good way for you to

reduce ambiguity and m ake your programs more

readable. However, parenthetical expressions use

internal data memory.

ARITHMETIC OPERATORS

Arithmetic operators perform basic arithme tic

functions:

+ addition

- subtraction, not negation

* multiplication

/ division

** exponential

OBSOLETE and MODIFIED

COMMANDS

A number of commands in the original BASIC-52

have been replaced, obsolete, or no longer

functional. The following is a list of obsolete

commands and are no longer available:

CLEAR I

CLOCK0

CLOCK1

FPROG through FPROG6

PORT1

PROG through PROG6

RAM

RCAP2

ROM

RROM

TIMER1

TIMER2

T2CON

XFER

XTAL

The following comm ands have been modified with

respect to name and operation:

Old New

ONEX1 ONITR

ONTIME ONTICK

PGM BSAVE

RROM EXECUTE

TIME TIME

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 162 163

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